Shimano
GRX RX812 Right Hand Hydraulic in-Line Bartop Brake Lever
Best secondary hydraulic brake for gravel cyclists seeking extra stopping control.
Engineered for the demands of gravel riding, the Shimano GRX RX812 Right Hand Hydraulic In-Line Bartop Brake Lever offers superior control and confidence across diverse terrains. This component integrates seamlessly with the Shimano GRX groupset, providing a premium upgrade for serious riders. It delivers precise and powerful hydraulic braking performance necessary for demanding off-road adventures. Whether upgrading an existing setup or building a custom gravel machine, this lever ensures reliable stopping power when you need it most.
$89.99
Owner Satisfaction
4.5
/ 5
Category Rank
671
/ 2105
#671 in Components
Price vs Category Average
-13%
Below average
Model Number
812
/ IBLRXR
Who it's for
- Gravel riders seeking extra control on technical climbs
- Cyclists demanding consistent hydraulic power from multiple hand positions
- Shimano GRX users wanting a seamless, factory-integrated cockpit setup
Who should skip it
- Home mechanics intimidated by hydraulic hose cutting and system bleeding
- Weight-conscious racers prioritizing a minimalist and lightweight handlebar setup
- Budget-focused riders looking for an affordable secondary braking solution
Performance breakdown
Braking Modulation
Hydraulic precision provides exceptional feedback for technical gravel descents.
Ergonomic Integration
Seamlessly fits existing GRX setups for a natural, intuitive hand position.
Build Durability
Rugged construction withstands the vibrations and impacts of off-road riding.
Stopping Power
Delivers consistent, high-force stopping performance in all weather conditions.
Installation Ease
Straightforward setup for experienced mechanics, though hydraulic bleeding requires patience.
Terrain Adaptability
Offers reliable control across loose gravel, mud, and technical singletrack.
Key Specs
Model Number
IBLRX812R
Hand Orientation
Right Hand
Braking Type
Hydraulic
Design
In-Line Bartop Lever
Features
- Precise hydraulic braking
- Seamless GRX integration
- Confident control on varied terrain
- Premium gravel upgrade
- Reliable off-road performance
- Engineered for gravel riding
What customers say
Riders highly value the Shimano GRX RX812 lever for its superior braking performance and excellent ergonomics, making it ideal for gravel adventures. The hydraulic system delivers consistent, reliable stopping power and modulation across varied and challenging terrain. Users consistently praise the comfortable, intuitive bartop lever design, which offers an accessible secondary braking position, significantly reducing hand fatigue on long rides. Build quality is robust, reflecting durable construction expected from Shimano. While positioned at a premium price, the enhanced control, safety, and comfort strongly justify the investment for serious off-road cyclists seeking a dependable component upgrade.
Know before you buy
Yes, the RX812 is designed to integrate seamlessly into your existing Shimano GRX hydraulic system, allowing you to add auxiliary braking control to the tops of your handlebars.
While it is engineered for the GRX ecosystem, it is designed for use with Shimano hydraulic road disc systems. We recommend confirming compatibility with your specific brake calipers before installation.
No, this is an in-line 'bartop' or sub-lever. It is intended to be installed in addition to your primary drop-bar brake levers to provide an extra hand position for braking while riding on the tops.
This specific model, IBLRX812R, is configured for the right-hand side only. You will need to purchase the corresponding left-hand version if you wish to have auxiliary levers on both sides of your cockpit.
Because it is part of your hydraulic circuit, the system will require a standard bleed process during installation to ensure there is no air in the line. Once properly bled, it requires the same minimal maintenance as your primary hydraulic levers.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$90